My feeling is I don't think they even finished the content of main game (or the concept, at least) at this point right now, and to the point that they need a survey to decide their further direction; I fear this would become the most retarded decision they made and harms the fan community further if their final result crashes
I can assure you that the main game is going quite well and that there should be no problems on that front. We're getting a very nice, polished demo in June, probably, which augurs well for the continuing development of the game
The survey is not intended to give further direction to the game itself, its purpose is A: To see if there's any broader interest in some of the fun stuff fans brought up on the Bloodstained forums, like sexy costumes for Miriam, and B: Get a handle on how fans feel about expansions and stuff. Again, there have been a ton of debates on the forums about things like backer exclusive content, and IGA can see both sides of the issue (on the one hand, backers should have a little reward for helping, but on the other hand, digitally locked exclusives are similar to shady business practices from EA). Thus, he's asking for a poll to see where the fans in general stand